vm can not dump graph.prf

i want to get graph.prf to optimize the system's bottlenecks, following the step described in Porting Guide
1 build cldc release version with ENABLE_WK_PROFILER to true
2 build Java Wireless Client software with USE_JAVA_PROFILER to true
3 specify +UseExactProfiler when start the Java Wireles Client software

but this cause a vm error:
Error ID: ..\cldc\src\vm\share\runtime\WTKProfiler.cpp, 548  ShouldNotReachHere()

is there any step or flag i missed?
[Message sent by forum member 'chenzhiyu' (chenzhiyu)]

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